This is a pretty simple application. So many font panels only let you see a few letters, the font name, or a statement of their choosing. All you have to do to see your text in every font installed on your computer is enter it in and click "update!"
There is an option to automatically apply the update to changes you've made, but it's disabled by default. I made this choice because sometimes it can take a while to perform the update. You can enable it if you wish.
There's not a lot to say about this little app, but I made it for myself and my friends and family kept asking for a copy, so I thought I'd share it with the world!
I'm considering releasing the source code (it's written it Apple's new Swift language. Drop me a line if you're interested.